E10 petrol set for September 2021 launch

[Jocko]

No comparison. It has to be Cask Strength Whisky - preferably Islay!

[Kremmen]

I might do what I did when I first got my Civic.

Run for a few months on E10 and note the mpg. Then run for a few months on E5 and compare. As I do roughly the same journey each week it should be a good test.

My Civic test involved Tesco 95 RON v BP and Shell high octane and the mpg and performance were identical throughout.

[Jocko]

I am going to have no means of comparison due to my change of driving habits. What's in the tank plus my next tankful will see me to my MOT in December.
Tomorrow I have a big trip. Shopping at my local Asda. 10-mile round trip, if I go the long way!

[E27006]

I might do what I did when I first got my Civic.

Run for a few months on E10 and note the mpg. Then run for a few months on E5 and compare. As I do roughly the same journey each week it should be a good test.

My Civic test involved Tesco 95 RON v BP and Shell high octane and the mpg and performance were identical throughout.

The problem is E10 does not mean 10% Ethanol content,  E10 means the fuel contains Ethanol in the  range of near-zero to 10% content.
We have no means of testing the Ethanol content of the fuel we use,  it could be 10%, it could be zero, or in between the values

[Major clanger]

[/quote]
We have no means of testing the Ethanol content of the fuel we use,  it could be 10%, it could be zero, or in between the values
[/quote]


Yes you do.  You need a graduated sample tube (with a cap) a bit like a test tube of say 100ml capacity.  Add 10ml of water and then top up to 100ml with E10, shake and then leave.  The Ethanol will mix with the water and settle out from the petrol, subtract the 10ml of water and the rest will be the ethanol.  Amazon used to sell a "test kit".

Its a faff but if you have a petrol lawn mower you could test it when you fill a 5 liter can.

[Major clanger]

I might do what I did when I first got my Civic.

Run for a few months on E10 and note the mpg. Then run for a few months on E5 and compare. As I do roughly the same journey each week it should be a good test.

My Civic test involved Tesco 95 RON v BP and Shell high octane and the mpg and performance were identical throughout.

When we changed to it about 18 months ago we went from an indicated 52.5 mpg on 95 to 50.5 mpg on E10

[Bazzzer]

Yes you do.  You need a graduated sample tube (with a cap) a bit like a test tube of say 100ml capacity.  Add 10ml of water and then top up to 100ml with E10, shake and then leave.  The Ethanol will mix with the water and settle out from the petrol, subtract the 10ml of water and the rest will be the ethanol.

This isn't strictly true... if you mix 10ml of ethanol thoroughly with 10ml of water, the resulting mixture will have a volume of 19.2ml, so your simple subtraction will not be accurate.

https://www.carolina.com/teacher-resources/Interactive/chemistry-lost-volume-demonstration/tr10785.tr

[Major clanger]

  Thank you for the correction 

[coffeecup]

2010 honda jazz i-shift, is E10 ok??

[Jocko]

Yes.

[Hicardo]

ive used E10, and cant detect any real world difference.....

[culzean]

Yes you do.  You need a graduated sample tube (with a cap) a bit like a test tube of say 100ml capacity.  Add 10ml of water and then top up to 100ml with E10, shake and then leave.  The Ethanol will mix with the water and settle out from the petrol, subtract the 10ml of water and the rest will be the ethanol.

This isn't strictly true... if you mix 10ml of ethanol thoroughly with 10ml of water, the resulting mixture will have a volume of 19.2ml, so your simple subtraction will not be accurate.

https://www.carolina.com/teacher-resources/Interactive/chemistry-lost-volume-demonstration/tr10785.tr

But like most things in life,  don't look for 10 decimal places when an approximation is good enough 

[JimSh]

Yes you do.  You need a graduated sample tube (with a cap) a bit like a test tube of say 100ml capacity.  Add 10ml of water and then top up to 100ml with E10, shake and then leave.  The Ethanol will mix with the water and settle out from the petrol, subtract the 10ml of water and the rest will be the ethanol.

This isn't strictly true... if you mix 10ml of ethanol thoroughly with 10ml of water, the resulting mixture will have a volume of 19.2ml, so your simple subtraction will not be accurate.

https://www.carolina.com/teacher-resources/Interactive/chemistry-lost-volume-demonstration/tr10785.tr

As well as that, all the ethanol is not going to be extracted by the water but will partition between the water and the petrol.
https://www.bing.com/videos/search?q=partition+coefficient+ethanol+in+water+and+octane&&view=detail&mid=C30A8A06784799A022EAC30A8A06784799A022EA&&FORM=VDRVRV

Anyway what's the point. To all intents and purposes unleaded, E5 and E10 will give similar performance.
https://www.bing.com/videos/search?q=How+does+ethanol+change+gasoline+and+octane%3f&docid=608052079438867705&mid=EF650B70126141376D66EF650B70126141376D66&view=detail&FORM=VIRE

[Kremmen]

They were saying on the news that E10 may cause issues in petrol mowers when left standing over winter.

Makes you wonder for us low mileage drivers. Presumably driving helps slosh it about and mix it up again ?

[TnTkr]

Here in Finland 98E5 is suggested for all small engines, such as chain saws, trimmers, mowers and outboard engines.